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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IPC_ATTACHMENT_BROKER_UNPRIVILEGED_H_
#define IPC_ATTACHMENT_BROKER_UNPRIVILEGED_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "ipc/attachment_broker.h"
#include "ipc/ipc_export.h"
namespace IPC {
class Endpoint;
class Sender;
// This abstract subclass of AttachmentBroker is intended for use in
// non-privileged processes.
class IPC_EXPORT AttachmentBrokerUnprivileged : public IPC::AttachmentBroker {
public:
AttachmentBrokerUnprivileged();
~AttachmentBrokerUnprivileged() override;
// If there is no global attachment broker, makes a new
// AttachmentBrokerUnprivileged and sets it as the global attachment broker.
// This method is thread safe.
static void CreateBrokerIfNeeded();
// AttachmentBroker:
void RegisterBrokerCommunicationChannel(Endpoint* endpoint) override;
void DeregisterBrokerCommunicationChannel(Endpoint* endpoint) override;
bool IsPrivilegedBroker() override;
protected:
IPC::Sender* get_sender() { return sender_; }
// Errors that can be reported by subclasses.
// These match tools/metrics/histograms/histograms.xml.
// This enum is append-only.
enum UMAError {
// The brokerable attachment was successfully processed.
SUCCESS = 0,
// The brokerable attachment's destination was not the process that received
// the attachment.
WRONG_DESTINATION = 1,
// An error occurred while trying to receive a Mach port with mach_msg().
ERR_RECEIVE_MACH_MESSAGE = 2,
ERROR_MAX
};
// Emits an UMA metric.
void LogError(UMAError error);
private:
// |sender_| is used to send Messages to the privileged broker process.
// |sender_| must live at least as long as this instance.
IPC::Sender* sender_;
DISALLOW_COPY_AND_ASSIGN(AttachmentBrokerUnprivileged);
};
} // namespace IPC
#endif // IPC_ATTACHMENT_BROKER_UNPRIVILEGED_H_
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